Modes 3-Mode Outdoor Ultrasonic Dog Bark Control - Anti-Bark Has 3 Adjustable Ultrasonic Volume Levels: Low Range, Mid Range And High Range, Can Automatically Detect A Dog'S Barking From A Distance Of 10 Meters (Works On Your Neighbours' Dogs Too!)100% Safe Dog Bark Control - The Ultrasonic Frequency Is Harmless To Pets And Has No Effect On The Ears. Harmless And Humane Way To Stop Your Dog And Your Neighbor'S Dog From Barking! The Dog Barking Device Has Passed Numerous Certifications, Effective On All Breeds And Sizes Of Dogs.Automatic Control - Sensitive Microphones Automatically Detect Dog Barking And Automatically Emit High-Pitched Sounds That Only The Dog Can Hear. Once The Dog Stops Barking, The Ultrasonic Bark Control Device Will Automatically Stop The Ultrasonic Sound Transmission.Ipx7 Waterproof Dog Bark Device - Ultrasonic Dog Skin Control, Durable, Weather-Resistant And Weather-Resistant, Lightweight And Waterproof Material, Safe For Indoor And Outdoor Use In Any Weather Condition.Hassle-Free After-Sales Service - Our Anti-Bark Device Offers A Refund Or A Full Replacement If It Doesn'T Fit Your Dogs, So There Is No Risk Of Purchase. Please Feel Free To Contact Us With Any Questions, We Will Do Our Best To Help And Support You.